Having been disappointed by Neil Thomas's 'proper' Pike & Shot rules, I thought it would be interesting to refight the battle using my heavily modified version of his One Hour Wargames set. The troops mostly translated across OK.
This time the Royalists fielded:
2 x Pike & Shot (Trained)
2 x Pike & Shot (Veteran)
2 x Horse (Trained, Dashing)
2 x Horse (Elite, Dashing)
Parliament opposed them with:
4 x Pike & Shot (Trained, Shot-Heavy)
3 x Horse (Raw)
1 x Horse (Elite, Disciplined)
('Shot Heavy' is covered in the optional rules)
The troop quality has an effect on how many hits a unit can take in total, not just close combat morale tests as in the other rules, so the Royalists had an edge in quality alone. The shot-heavy Parliamentarian foot would be good at shooting, but in these rules can run out of ammunition, leaving them obliged to fight in close combat, where they suffer a minor penalty.
On paper the battle was very much weighted towards the Royalists; they had a hill they could defend, and better horse.
A lot of the foot was now out of ammunition, and were charging all down the line. The Royalists were winning where they had the hill advantage, but were being ground down elsewhere thanks to flanking horse.
Despite their advantages the Royalists lost; they got a few bad combat rolls early on, which allowed Parliament to score a few kills with no return, and possibly offset the edge their opponents had.